Nothing personal, but this is total bullsh** on so many levels, dude. Just because you don't know what real training is doesn't mean it doesn't exist--I probably wouldn't have known what real training was either if I didn't have a bro who ran XC in high school and was a fan of the marathon. I've run one marathon, and it was in just over 3 hours (and don't plan on doing another one). I was 21 then, while at 18 I was a 250lb offensive lineman who had never run more than a quarter at one time.
Your "training" had to be shit--you were running the sort of mileage that a middle-aged woman runs to prep for getting through a marathon. Real training for a healthy, young male is well north of 70 miles a week (I logged a couple 100+ weeks, for instance) and involves running at a bare minimum 6 days/week. People can "run" marathons without training much at all. Hell, I'm pretty untrained right now, but I know I could go and bang out an ugly sub-4 marathon.
Not meaning to turn this into a marathon thread, but I'm just saying--at least own that you were not training, as it will give a more accurate assessment of your current level of fitness. You might have "conditioned" (to use your term) for a few months or whatever, but you certainly didn't train.